Hiiro realizes that he possesses Dagan Zot's heart, and that if he dies, Dagan Zot will die as well.  Only after Giruu reveals the depths of his devotion does Hiiro find the strength to carry on.
And at night he'd study magic.
وفي المساء كان يدرس السحر
und nachts Magie büffeln.
y de noche estudiaba magia.
y de noche estudiaba magia.
et étudiait la magie la nuit.
e la notte studia magia.
E à noite, ele estudava magia.